(19)

(11)

EP 0 190 280 A1

(12)

(43) Date of publication: 13.08.1986 Bulletin 1986/33 (21) Application number: 85904024.0 (22) Date of filing: 08.08.1985

(51) International Patent Classification (IPC):  G01N 21/ 35( . ) G01N 21/ 39( . ) G01S 17/ 95( . ) (86) International application number: PCT/SE1985/000305 (87) International publication number: WO 1986/001295 (27.02.1986 Gazette 1986/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 10.08.1984 SE 19840004064 (71) Applicant: Boliden Aktiebolag S-114 85 Stockholm (SE)	(72) Inventors: EDNER, Hans, Georg S-223 58 Lund (SE) SVANBERG, Sune, Roland S-222 25 Lund (SE) UNEUS, Leif, Peter S-222 34 Lund (SE) WENDT, Erik, Wilhelm S-222 23 Lund (SE)